Perhaps you should try some spelling variations:
cong thoi » cong thai, cong nhoi, trong thoi
hoc doanh » hoa doanh, hoc danh, hoc dan
danh nhan » doanh nhan, thanh nhan, benh nhan
thoi dap » hoi dap, thoi dai, thi dap
hoi danh » hop danh, hoi dan, hoc danh
nhan dan » phan dau, gian dan, nhan tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu cong thoi dap, nghien cuu mot hoc doanh ((khoa hoc) or (hoa hoc)) xa hoi danh nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cong thoi dap, nghien cuu mot hoc doanh ((khoa hoc) OR (hoa hoc)) xa hoi danh nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu cong thoi dap, nghien cuu mot hoc doanh ((khoa hoc) or (hoa hoc)) xa hoi danh nhan dan*.